Hi all. At the moment I am sharing partitions of a USB drive over the network so different computers can back up to their dedicated partition using TimeMachine. I would like to buy a NAS instead so the other computers would be able to back up independently. Which NAS do you recommend? I think something like 4-6TB would be enough. Is there something reliable but not too expensive in the market? I am only going to use it with TimeMachine. Thanks